Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b37a7f9c4d8b1c…

MALICIOUS

PDF

49.0 KB Created: 2021-06-04 04:35:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c985978ac99a2aa60652b9cf845b311c SHA-1: 41ca44d70a32ca42b6c173e2bde2b1ba83ab8109 SHA-256: e2b37a7f9c4d8b1c218afa542077eab1e1ba16a3c0f4a588b26dcfab8daa4441
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/431946152/how-to-hack-digimon-aurity-roblox-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/pokemon-go-free-key_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-white-hair-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/tiktok-free-internet_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f98.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F98 25796 bytes
SHA-256: d50badccb2443df074c5334f24a1995289744f7c2fc3b1cabedd432b1b5f9625
font_01_sfnt_off00008b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B90 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000098a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A1 19608 bytes
SHA-256: 2d61cf6a5c03bd47d4e94159587c1cb782d3f274a1692315a9293d0d84f9970c

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